PPA-containing layered double hydroxide (LDH) films for corrosion protection of a magnesium alloy

Wen, Tiantian; Yan, Rusen; Wang, Nan; Li, Yuxuan; Chen, Ting; Ma, Houyi

doi:10.1016/j.surfcoat.2019.125255

Cited by 46 publications

(15 citation statements)

References 58 publications

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“…Figure 3 shows SEM images of the MgAl-CO 3 2− -LDH and MgAl-LDH-TTAB powders with characteristic plate-like and hexagonal LDHs [ 17 , 39 ]. As shown in Figure 3 , MgAl-LDH-TTAB powders with a mean particle size of 100–200 nm are much smaller and more homogenous than MgAl-CO 3 2− -LDH powders with an average size of 2–4 μm.…”

Section: Resultsmentioning

confidence: 99%

“…The results suggest that fine and uniform LDH can be produced by adding cationic surfactant during the process of in situ hydrothermal synthesis. Figure 3 shows SEM images of the MgAl-CO3 2− -LDH and MgAl-LDH-TTAB powders with characteristic plate-like and hexagonal LDHs [17,39]. As shown in Figure 3, MgAl-LDH-TTAB powders with a mean particle size of 100-200 nm are much smaller and more homogenous than MgAl-CO3 2− -LDH powders with an average size of 2-4 μm.…”

Section: Characterization Of Mgal-co 3 2− -Ldh and Mgal-ldh-ttab Powd...mentioning

confidence: 99%

“…In the past years, a variety of treatment techniques have been used to improve the corrosion resistance of the LDH film. Several researchers developed LDH films with corrosion inhibitor intercalation to enhance their corrosion resistance, such as aspartic acid [ 12 ], 8-hydroxyquinoline [ 16 ], and phenylphosphonic acid [ 17 ]. Some researchers also utilized low surface energy substances, such as aliphatic carboxylic acid [ 13 ] and fluoroalkyl silane [ 18 ], to obtain superhydrophobic LDH films with improved corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Corrosion Resistance of Layered Double Hydroxide Films on Mg Alloy: The Key Role of Cationic Surfactant

et al. 2022

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In this study, dense anticorrosion magnesium–aluminum layered double hydroxide (MgAl-LDH) films were prepared for the first time by introducing a cationic surfactant tetradecyltrimethyl ammonium bromide (TTAB) in the process of in situ hydrothermal synthesis of Mg-Al LDH films on an AZ31 magnesium alloy. Results of XRD, FTIR, and SEM confirmed that TTAB forms the MgAl-LDH-TTAB, although TTAB cannot enter into LDH layers, and MgAl-LDH-TTAB powders are much smaller and more homogenous than MgAl-CO32−-LDH powders. Results of SEM, EDS, mapping, and XPS confirmed that TTAB forms the MgAl-LDH-TTAB films and endows LDH films with denser structure, which provides films with better shielding efficiency. Results of potentiodynamic polarization curves (PDP) and electrochemical impedance spectroscopy (EIS) confirmed that MgAl-LDH-TTABx g films have better corrosion resistance than an MgAl-CO32−-LDH film. The corrosion current density (icorr) of the MgAl-LDH-TTAB0.35 g film in 3.5 wt.% NaCl solution was reduced to 1.09 × 10−8 A.cm−2 and the |Z|f = 0.05 Hz value was increased to 4.48 × 105 Ω·cm2. Moreover, the increasing concentration of TTAB in MgAl-LDH-TTABx g (x = 0.025, 0.05, 0.1, 0.2 and 0.35) provided denser outer layer LDH films and thereby increased the corrosion resistance of the AZ31 Mg alloy. Additionally, the |Z|f = 0.05 Hz values of the MgAl-LDH-TTAB0.35 g film still remained at 105 Ω·cm2 after being immersed in 3.5 wt.% NaCl solution for 168 h, implying the good long-term corrosion resistance of MgAl-LDH-TTABx g films. Therefore, introducing cationic surfactant in the process of in situ hydrothermal synthesis can be seen as a novel approach to creating efficient anticorrosion LDH films for Mg alloys.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Mgal-co 3 2− -Ldh and Mgal-ldh-ttab Powd...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Corrosion Resistance of Layered Double Hydroxide Films on Mg Alloy: The Key Role of Cationic Surfactant

et al. 2022

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“…[16,26] Meanwhile, the corrosion current density is associated with the kinetic properties, in which lower corrosion current densities imply slower corrosion rates. [27][28][29] In Table 1, AZ31-M shows a more positive corrosion potential (-1.267 V) and a smaller corrosion current density (5.27 μA cm −2 ) compared with the AZ31 (E corr = -1.494 V, i corr = 6.19 μA cm −2 ), suggesting that the superhydrophobic coating can improve the corrosion resistance of the substrate. In addition, the LDH coating can also increase the corrosion resistance of the Mg matrix.…”

Section: Polarization Characterizationmentioning

confidence: 99%

Double‐anticorrosion ability of in‐situ superhydrophobic MgAl‐LDH coating with excellent stability of the corrosion resistance on magnesium alloy AZ31

Han

Wang

et al. 2023

Materials & Corrosion

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We reported the realization of superhydrophobic layered double hydroxide (LDH) coating with the double-anticorrosion mechanism on magnesium alloys. This coating was prepared via in-situ growth of LDHs on the etched AZ31 alloy and the modification was caused by 1H, 1H, 2H, 2Hperfluorooctyltrimethoxysilane. The water contact angle on the coating was as large as 161°, possessing the two-scale rough structure consisting of microislands and LDH crystal nanosheets. The excellent corrosion resistance properties of the superhydrophobic LDH coating can be attributed to the double-anticorrosion mechanism associated with LDH coating and superhydrophobic structure. In addition to the active protection of LDH coating, the passive protection of superhydrophobic coating can suppress the occurrence of ion-exchange reactions, leading to excellent corrosion resistance stability.

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“…This has the potential to give long-term corrosion protection. Various corrosion inhibitors have been incorporated as the anionic species within LDHs, and these include inorganic compounds such as molybdate [100][101][102][103], permanganate [104], nitrate [105][106][107], nitrite [77,108,109], phosphate [62], phenylphosphonate [110] and vanadate [111][112][113]. Also, organic inhibitors such as benzoate, 3-aminopropyltriethoxysilane, 8-hydroxyquinoline [63], 5-aminoindazole [90], benzotriazole [114], mercaptobenzothiazole [96,115,116], 2-mercaptobenzothiazole [117], thiophene derivatives [118], aspartic acid [119], 8-hydroxyquinoline [120], triazoles [121], α-amino acids [122] and 2-benzothiazolylthio-succinate [123] have been incorporated as the anionic species in LDHs.…”

Section: Layered Double Hydroxidesmentioning

confidence: 99%

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

et al. 2022

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Metals and alloys are essential in modern society, and are used in our daily activities. However, they are prone to corrosion, with the conversion of the metal/alloy to its more thermodynamically-favored oxide/hydroxide phase. These undesirable corrosion reactions can lead to the failure of metallic components. Consequently, corrosion-protective technologies are now more important than ever, as it is essential to reduce the waste of valuable resources. In this review, we consider the role of emerging 2D materials and layered materials in the development of a corrosion protection strategy. In particular, we focus on the materials beyond graphene, and consider the role of transition metal dichalcogenides, such as MoS2, MXenes, layered double hydroxides, hexagonal boron nitride and graphitic carbon nitride in the formulation of effective and protective films and coatings. Following a short introduction to the synthesis and exfoliation of the layered materials, their role in corrosion protection is described and discussed. Finally, we discuss the future applications of these 2D materials in corrosion protection.

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PPA-containing layered double hydroxide (LDH) films for corrosion protection of a magnesium alloy

Cited by 46 publications

References 58 publications

Enhanced Corrosion Resistance of Layered Double Hydroxide Films on Mg Alloy: The Key Role of Cationic Surfactant

Enhanced Corrosion Resistance of Layered Double Hydroxide Films on Mg Alloy: The Key Role of Cationic Surfactant

Double‐anticorrosion ability of in‐situ superhydrophobic MgAl‐LDH coating with excellent stability of the corrosion resistance on magnesium alloy AZ31

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

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